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Only poetry cannot be translated well.

Jonathan W.Jonathan W. Member
in Logical Reasoning 48 karma
Only poetry cannot be translated well.
Why is it diagrammed /TW-->P?

I thought that with cannot we pick one idea, negate it and make it the necessary. So if I chose poetry to be negated, why can it not be TW-->/P. Some help would be great. Thank you!
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Comments

  • PacificoPacifico Alum Inactive ⭐
    edited November 2015 8021 karma
    There is a group 2 indicator (only) and a group 4 indicator (cannot) in that sentence. So you can use either one, but generally it's easier to use group 4 indicators as negations and use the other one as the logical indicator.
  • nye8870nye8870 Alum ⭐
    1749 karma
    If a written work cannot be translated well then it must be poetry. Why? Because only poetry cannot be translated well. /TW --> P
  • Jonathan W.Jonathan W. Member
    48 karma
    Hi

    Thank for the replies. I'm finding it hard to see how /TW-->P and TW-->/P are contrapositives of each other.
    /TW->P (/P->TW)
    TW->/P (P->/TW)

    So if there there are two logical operators (Only and cannot) I should use only as the necessary indicator and cannot as just a negation?

    Thanks!
  • PacificoPacifico Alum Inactive ⭐
    edited November 2015 8021 karma
    Oh sorry I was not reading that correctly... You're right that's not the contrapositive... Read @nye8870's comment above... And yes to your final question...
  • DumbHollywoodActorDumbHollywoodActor Alum Inactive ⭐
    7468 karma
    I think the difficulty is that it’s a bizarre statement.

    Classic Group 2: http://7sage.com/lesson/basic-translation-group-2/

    Th “only” takes precedence over the “cannot."

    /TW-->P (If it’s not translated well, then it’s poetry)
    or
    /P-->TW (If it’s not poetry, then it’s translated well)

    Or because this is an “or” logical configuration, you can think of it as "writing is either poetry or translated well.” (http://7sage.com/lesson/not-both-v-or-truth-tables/)
  • Jonathan W.Jonathan W. Member
    48 karma
    Great. Thank you all for being so helpful!
  • Sailor Moon LSATSailor Moon LSAT Member ⭐
    200 karma

    I know this is old, but just adding here because this is helpful. It comes from this question

    https://7sage.com/lsat_explanations/lsat-26-section-3-question-20/

    26.03.20

  • whatsmynamewhatsmyname Member
    606 karma

    have girlfriend if I get muscles
    G-->L

    have girlfriend ONLY IF I get muscles
    G-->M

    have girlfriend IF AND ONLY IF I get muscles
    G<-->M

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